PDF tools · batch
The folder is the job: a month of invoices, a scanner's worth of pages, a whole class of forms. Pick the folder, check the order, take one file away. Everything runs in your browser; the files are never uploaded. The hand-ordered version is the Merge PDF page.
For a folder of separate PDFs, scans, receipts, statements, that belong in one file, in name order.
Pick the folder or the files
Put the files in order
Download the merged PDF
Drop PDFs on the tray, or click to pick them
PDF · tested with 50 files in one run · they stay on this device
Files merge top to bottom. Scanners and export tools usually name files in the order they were made, so the name sort gets most folders right in one click; the Up and Down buttons fix the rest.
Pick two or more PDFs to begin.
The page opens each PDF, copies its pages into a new file in list order, and saves. Pages are copied, not rebuilt, so nothing is recompressed and nothing is lost. It is the fastest job here: the whole 25-file test pack took 71 milliseconds of engine time.
The limit is your device's memory, not a rule of ours: the batch merge was tested with 50 files in one run. A tray of very large files on a small phone can run out of room, and if that happens your originals are unchanged. A file this page cannot read as a PDF is marked on the list and left out of the merge, in plain words, before you run the job.
A password-protected PDF cannot be opened by this tool. Take its password off first with the unlock tool, then bring the file back.
Same engine, batch first. This page is set up for the folder job: pick a whole folder of PDFs at once, sort the tray by file name in one click, and check every file's page count before you merge. The Merge PDF page is the same merge with hand ordering as the main act.
As many as your device can hold in memory at once; past the tested size, the memory of your device is the limit. The batch merge was tested with 50 files in one run. In our earlier tests, 25 one-page files merged in 71 milliseconds and the result was about 30% smaller than the biggest PDF site produced from the same 25 files. There is no counter here and no per-day allowance.
No. Pages are copied as they are, not re-drawn or recompressed. Text stays text, and the file sizes add up to roughly the sum of the parts.
Nowhere. They are read into this page and merged in your browser. Watch the network panel while it works if you want to check.